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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Grid Layout Test: Expand flexible tracks with a fractional size</title>
<link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
<link rel="author" title="Mozilla" href="https://www.mozilla.org/">
<link rel="help" href="https://drafts.csswg.org/css-grid-2/#algo-flex-tracks">
<link rel="help" href="https://drafts.csswg.org/css-grid-2/#algo-find-fr-size">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<style>
.grid {
display: grid;
width: 100px;
background: red;
}
.item {
grid-row: 2 / span 1;
background: green;
width: 100px;
height: 100px;
position: relative;
top: -32px; /* To move this item up to cover the first row */
}
</style>
<!--
Flexible row track sizes are resolved in two passes:
The first pass:
- The only grid item has a max-content height of 100px, which is also the
hypothetical fr size.
- Initially, each flexible track (0.4fr) is given a hypothetical size of
100px * 0.4 = 40px.
- This makes the grid container's height 40px * 2 = 80px in this pass.
The second pass:
- With the grid container's height now became fixed at 80px, the available
grid space is known.
- Per https://drafts.csswg.org/css-grid-2/#algo-find-fr-size
the hypothetical fr size is 80px * max(0.4 * 2 , 1.0) = 80px.
- In this pass, each 0.4fr row track resolves to 80px * 0.4 = 32px in height.
-->
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div class="grid" style="grid-template-rows: repeat(2, minmax(0,0.4fr))">
<span class="item"></span>
</div>
|
